TMS320F280039C-Q1: TIDM-2014

what was the max frequency of this demo, said that it support a 20000rpm application, two poles motor or four or something else?

was there control quanlity difference between 280039c and am2634

max frequncy of this demo? how much?

The pwm frequency is 20kHz, double sample mode, so the control frequency is 40kHz, pwm duty updates every 25us. for four poles motor, it supports 20000rpm. 

so the current loop is 40khz, the speed loop is slower?

Yes, you are right.

i had browsered wolfspeed website, could you tell me about the model type of the kit. so i can consult the sellers

I'll send you a private message and put you in touch with wolfspeed!

thanks